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Date:   Wed, 23 Jun 2021 13:49:24 -0700
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Subject: Re: [PATCH v1] crypto: Make the DRBG compliant with NIST SP800-90A rev1
To:     James Morris <jamorris@linux.microsoft.com>,
        Stephan Mueller <smueller@chronox.de>
CC:     =?ISO-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>,
        David Miller <davem@davemloft.net>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        John Haxby <john.haxby@oracle.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Simo Sorce <simo@redhat.com>, linux-crypto@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        =?ISO-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@linux.microsoft.com>,
        tytso@mit.edu
From:   "H. Peter Anvin" <hpa@zytor.com>
Message-ID: <98006AFB-C40E-46F7-BE88-D8E66653B71B@zytor.com>
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This one really does keep coming back like yesterday's herring, doesn't it=
=2E=2E=2E

On June 23, 2021 10:00:29 AM PDT, James Morris <jamorris@linux=2Emicrosoft=
=2Ecom> wrote:
>On Wed, 23 Jun 2021, Stephan Mueller wrote:
>
>>=20
>> > These changes replace the use of the Linux RNG with the Jitter RNG,
>> > which is NIST SP800-90B compliant, to get a proper entropy input
>and a
>> > nonce as defined by FIPS=2E
>>=20
>> Can you please help me understand what is missing in the current code
>which
>> seemingly already has achieved this goal?
>
>The advice we have is that if an attacker knows the internal state of
>the=20
>CPU, then the output of the Jitter RNG can be predicted=2E

--=20
Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E